cavlc.c
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上传日期:2021-12-09
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文件大小:26k
源码类别:
Audio
开发平台:
Visual C++
- /*****************************************************************************
- * cavlc.c: h264 encoder library
- *****************************************************************************
- * Copyright (C) 2003-2008 x264 project
- *
- * Authors: Laurent Aimar <fenrir@via.ecp.fr>
- * Loren Merritt <lorenm@u.washington.edu>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
- *****************************************************************************/
- #include "common/common.h"
- #include "macroblock.h"
- static const uint8_t intra4x4_cbp_to_golomb[48]=
- {
- 3, 29, 30, 17, 31, 18, 37, 8, 32, 38, 19, 9, 20, 10, 11, 2,
- 16, 33, 34, 21, 35, 22, 39, 4, 36, 40, 23, 5, 24, 6, 7, 1,
- 41, 42, 43, 25, 44, 26, 46, 12, 45, 47, 27, 13, 28, 14, 15, 0
- };
- static const uint8_t inter_cbp_to_golomb[48]=
- {
- 0, 2, 3, 7, 4, 8, 17, 13, 5, 18, 9, 14, 10, 15, 16, 11,
- 1, 32, 33, 36, 34, 37, 44, 40, 35, 45, 38, 41, 39, 42, 43, 19,
- 6, 24, 25, 20, 26, 21, 46, 28, 27, 47, 22, 29, 23, 30, 31, 12
- };
- static const uint8_t mb_type_b_to_golomb[3][9]=
- {
- { 4, 8, 12, 10, 6, 14, 16, 18, 20 }, /* D_16x8 */
- { 5, 9, 13, 11, 7, 15, 17, 19, 21 }, /* D_8x16 */
- { 1, -1, -1, -1, 2, -1, -1, -1, 3 } /* D_16x16 */
- };
- static const uint8_t sub_mb_type_p_to_golomb[4]=
- {
- 3, 1, 2, 0
- };
- static const uint8_t sub_mb_type_b_to_golomb[13]=
- {
- 10, 4, 5, 1, 11, 6, 7, 2, 12, 8, 9, 3, 0
- };
- #define BLOCK_INDEX_CHROMA_DC (-1)
- #define BLOCK_INDEX_LUMA_DC (-2)
- static inline void bs_write_vlc( bs_t *s, vlc_t v )
- {
- bs_write( s, v.i_size, v.i_bits );
- }
- /****************************************************************************
- * block_residual_write_cavlc:
- ****************************************************************************/
- static void block_residual_write_cavlc( x264_t *h, bs_t *s, int i_idx, int16_t *l, int i_count )
- {
- int level[16], run[16];
- int i_total, i_trailing;
- int i_total_zero;
- int i_last;
- unsigned int i_sign;
- int i;
- int i_suffix_length;
- /* first find i_last */
- for( i_last = i_count-1; i_last >= 3; i_last -= 4 )
- if( *(uint64_t*)(l+i_last-3) )
- break;
- while( i_last >= 0 && l[i_last] == 0 )
- i_last--;
- i_sign = 0;
- i_total = 0;
- i_trailing = 0;
- i_total_zero = i_last + 1;
- if( i_last >= 0 )
- {
- int idx = 0;
- /* level and run and total */
- while( i_last >= 0 )
- {
- int r = 0;
- level[idx] = l[i_last];
- while( --i_last >= 0 && l[i_last] == 0 )
- r++;
- run[idx++] = r;
- }
- i_total = idx;
- i_total_zero -= idx;
- i_trailing = X264_MIN(3, idx);
- for( idx = 0; idx < i_trailing; idx++ )
- {
- if( (unsigned)(level[idx]+1) > 2 )
- {
- i_trailing = idx;
- break;
- }
- i_sign <<= 1;
- i_sign |= level[idx] < 0;
- }
- }
- /* total/trailing */
- if( i_idx == BLOCK_INDEX_CHROMA_DC )
- bs_write_vlc( s, x264_coeff_token[4][i_total*4+i_trailing] );
- else
- {
- /* x264_mb_predict_non_zero_code return 0 <-> (16+16+1)>>1 = 16 */
- static const int ct_index[17] = {0,0,1,1,2,2,2,2,3,3,3,3,3,3,3,3,3 };
- int nC = x264_mb_predict_non_zero_code( h, i_idx == BLOCK_INDEX_LUMA_DC ? 0 : i_idx );
- bs_write_vlc( s, x264_coeff_token[ct_index[nC]][i_total*4+i_trailing] );
- }
- if( i_total <= 0 )
- return;
- i_suffix_length = i_total > 10 && i_trailing < 3 ? 1 : 0;
- if( i_trailing > 0 )
- bs_write( s, i_trailing, i_sign );
- for( i = i_trailing; i < i_total; i++ )
- {
- int mask = level[i] >> 15;
- int abs_level = (level[i]^mask)-mask;
- int i_level_code = abs_level*2-mask-2;
- if( i == i_trailing && i_trailing < 3 )
- i_level_code -= 2; /* as level[i] can't be 1 for the first one if i_trailing < 3 */
- if( ( i_level_code >> i_suffix_length ) < 14 )
- bs_write( s, (i_level_code >> i_suffix_length) + 1 + i_suffix_length,
- (1<<i_suffix_length) + (i_level_code & ((1<<i_suffix_length)-1)) );
- else if( i_suffix_length == 0 && i_level_code < 30 )
- bs_write( s, 19, (1<<4) + (i_level_code - 14) );
- else if( i_suffix_length > 0 && ( i_level_code >> i_suffix_length ) == 14 )
- bs_write( s, 15 + i_suffix_length,
- (1<<i_suffix_length) + (i_level_code & ((1<<i_suffix_length)-1)) );
- else
- {
- int i_level_prefix = 15;
- i_level_code -= 15 << i_suffix_length;
- if( i_suffix_length == 0 )
- i_level_code -= 15;
- /* If the prefix size exceeds 15, High Profile is required. */
- if( i_level_code >= 1<<12 )
- {
- if( h->sps->i_profile_idc >= PROFILE_HIGH )
- {
- while( i_level_code > 1<<(i_level_prefix-3) )
- {
- i_level_code -= 1<<(i_level_prefix-3);
- i_level_prefix++;
- }
- }
- else
- {
- #ifdef RDO_SKIP_BS
- /* Weight highly against overflows. */
- s->i_bits_encoded += 1000000;
- #else
- x264_log(h, X264_LOG_WARNING, "OVERFLOW levelcode=%d is only allowed in High Profile", i_level_code );
- /* clip level, preserving sign */
- i_level_code = (1<<12) - 2 + (i_level_code & 1);
- #endif
- }
- }
- bs_write( s, i_level_prefix + 1, 1 );
- bs_write( s, i_level_prefix - 3, i_level_code & ((1<<(i_level_prefix-3))-1) );
- }
- if( i_suffix_length == 0 )
- i_suffix_length++;
- if( abs_level > (3 << (i_suffix_length-1)) && i_suffix_length < 6 )
- i_suffix_length++;
- }
- if( i_total < i_count )
- {
- if( i_idx == BLOCK_INDEX_CHROMA_DC )
- bs_write_vlc( s, x264_total_zeros_dc[i_total-1][i_total_zero] );
- else
- bs_write_vlc( s, x264_total_zeros[i_total-1][i_total_zero] );
- }
- for( i = 0; i < i_total-1 && i_total_zero > 0; i++ )
- {
- int i_zl = X264_MIN( i_total_zero - 1, 6 );
- bs_write_vlc( s, x264_run_before[i_zl][run[i]] );
- i_total_zero -= run[i];
- }
- }
- static void cavlc_qp_delta( x264_t *h, bs_t *s )
- {
- int i_dqp = h->mb.i_qp - h->mb.i_last_qp;
- /* Avoid writing a delta quant if we have an empty i16x16 block, e.g. in a completely flat background area */
- if( h->mb.i_type == I_16x16 && !(h->mb.i_cbp_luma | h->mb.i_cbp_chroma)
- && !array_non_zero(h->dct.luma16x16_dc) )
- {
- #ifndef RDO_SKIP_BS
- h->mb.i_qp = h->mb.i_last_qp;
- #endif
- i_dqp = 0;
- }
- if( i_dqp )
- {
- if( i_dqp < -26 )
- i_dqp += 52;
- else if( i_dqp > 25 )
- i_dqp -= 52;
- }
- bs_write_se( s, i_dqp );
- }
- static void cavlc_mb_mvd( x264_t *h, bs_t *s, int i_list, int idx, int width )
- {
- DECLARE_ALIGNED_4( int16_t mvp[2] );
- x264_mb_predict_mv( h, i_list, idx, width, mvp );
- bs_write_se( s, h->mb.cache.mv[i_list][x264_scan8[idx]][0] - mvp[0] );
- bs_write_se( s, h->mb.cache.mv[i_list][x264_scan8[idx]][1] - mvp[1] );
- }
- static void cavlc_mb8x8_mvd( x264_t *h, bs_t *s, int i_list, int i )
- {
- if( !x264_mb_partition_listX_table[i_list][ h->mb.i_sub_partition[i] ] )
- return;
- switch( h->mb.i_sub_partition[i] )
- {
- case D_L0_8x8:
- case D_L1_8x8:
- case D_BI_8x8:
- cavlc_mb_mvd( h, s, i_list, 4*i, 2 );
- break;
- case D_L0_8x4:
- case D_L1_8x4:
- case D_BI_8x4:
- cavlc_mb_mvd( h, s, i_list, 4*i+0, 2 );
- cavlc_mb_mvd( h, s, i_list, 4*i+2, 2 );
- break;
- case D_L0_4x8:
- case D_L1_4x8:
- case D_BI_4x8:
- cavlc_mb_mvd( h, s, i_list, 4*i+0, 1 );
- cavlc_mb_mvd( h, s, i_list, 4*i+1, 1 );
- break;
- case D_L0_4x4:
- case D_L1_4x4:
- case D_BI_4x4:
- cavlc_mb_mvd( h, s, i_list, 4*i+0, 1 );
- cavlc_mb_mvd( h, s, i_list, 4*i+1, 1 );
- cavlc_mb_mvd( h, s, i_list, 4*i+2, 1 );
- cavlc_mb_mvd( h, s, i_list, 4*i+3, 1 );
- break;
- }
- }
- static inline void x264_macroblock_luma_write_cavlc( x264_t *h, bs_t *s, int i8start, int i8end )
- {
- int i8, i4, i;
- if( h->mb.b_transform_8x8 )
- {
- /* shuffle 8x8 dct coeffs into 4x4 lists */
- for( i8 = i8start; i8 <= i8end; i8++ )
- if( h->mb.i_cbp_luma & (1 << i8) )
- for( i4 = 0; i4 < 4; i4++ )
- for( i = 0; i < 16; i++ )
- h->dct.luma4x4[i4+i8*4][i] = h->dct.luma8x8[i8][i4+i*4];
- }
- for( i8 = i8start; i8 <= i8end; i8++ )
- if( h->mb.i_cbp_luma & (1 << i8) )
- for( i4 = 0; i4 < 4; i4++ )
- {
- h->mb.cache.non_zero_count[x264_scan8[i4+i8*4]] = array_non_zero_count( h->dct.luma4x4[i4+i8*4] );
- block_residual_write_cavlc( h, s, i4+i8*4, h->dct.luma4x4[i4+i8*4], 16 );
- }
- }
- /*****************************************************************************
- * x264_macroblock_write:
- *****************************************************************************/
- void x264_macroblock_write_cavlc( x264_t *h, bs_t *s )
- {
- const int i_mb_type = h->mb.i_type;
- int i_mb_i_offset;
- int i;
- #ifndef RDO_SKIP_BS
- const int i_mb_pos_start = bs_pos( s );
- int i_mb_pos_tex;
- #endif
- switch( h->sh.i_type )
- {
- case SLICE_TYPE_I:
- i_mb_i_offset = 0;
- break;
- case SLICE_TYPE_P:
- i_mb_i_offset = 5;
- break;
- case SLICE_TYPE_B:
- i_mb_i_offset = 23;
- break;
- default:
- x264_log(h, X264_LOG_ERROR, "internal error or slice unsupportedn" );
- return;
- }
- if( h->sh.b_mbaff
- && (!(h->mb.i_mb_y & 1) || IS_SKIP(h->mb.type[h->mb.i_mb_xy - h->mb.i_mb_stride])) )
- {
- bs_write1( s, h->mb.b_interlaced );
- }
- #ifndef RDO_SKIP_BS
- if( i_mb_type == I_PCM)
- {
- bs_write_ue( s, i_mb_i_offset + 25 );
- i_mb_pos_tex = bs_pos( s );
- h->stat.frame.i_mv_bits += i_mb_pos_tex - i_mb_pos_start;
- bs_align_0( s );
- memcpy( s->p, h->mb.pic.p_fenc[0], 256 );
- s->p += 256;
- for( i = 0; i < 8; i++ )
- memcpy( s->p + i*8, h->mb.pic.p_fenc[1] + i*FENC_STRIDE, 8 );
- s->p += 64;
- for( i = 0; i < 8; i++ )
- memcpy( s->p + i*8, h->mb.pic.p_fenc[2] + i*FENC_STRIDE, 8 );
- s->p += 64;
- /* if PCM is chosen, we need to store reconstructed frame data */
- h->mc.copy[PIXEL_16x16]( h->mb.pic.p_fdec[0], FDEC_STRIDE, h->mb.pic.p_fenc[0], FENC_STRIDE, 16 );
- h->mc.copy[PIXEL_8x8] ( h->mb.pic.p_fdec[1], FDEC_STRIDE, h->mb.pic.p_fenc[1], FENC_STRIDE, 8 );
- h->mc.copy[PIXEL_8x8] ( h->mb.pic.p_fdec[2], FDEC_STRIDE, h->mb.pic.p_fenc[2], FENC_STRIDE, 8 );
- h->stat.frame.i_tex_bits += bs_pos(s) - i_mb_pos_tex;
- return;
- }
- #endif
- /* Write:
- - type
- - prediction
- - mv */
- if( i_mb_type == I_4x4 || i_mb_type == I_8x8 )
- {
- int di = i_mb_type == I_8x8 ? 4 : 1;
- bs_write_ue( s, i_mb_i_offset + 0 );
- if( h->pps->b_transform_8x8_mode )
- bs_write1( s, h->mb.b_transform_8x8 );
- /* Prediction: Luma */
- for( i = 0; i < 16; i += di )
- {
- int i_pred = x264_mb_predict_intra4x4_mode( h, i );
- int i_mode = x264_mb_pred_mode4x4_fix( h->mb.cache.intra4x4_pred_mode[x264_scan8[i]] );
- if( i_pred == i_mode )
- bs_write1( s, 1 ); /* b_prev_intra4x4_pred_mode */
- else
- bs_write( s, 4, i_mode - (i_mode > i_pred) );
- }
- bs_write_ue( s, x264_mb_pred_mode8x8c_fix[ h->mb.i_chroma_pred_mode ] );
- }
- else if( i_mb_type == I_16x16 )
- {
- bs_write_ue( s, i_mb_i_offset + 1 + x264_mb_pred_mode16x16_fix[h->mb.i_intra16x16_pred_mode] +
- h->mb.i_cbp_chroma * 4 + ( h->mb.i_cbp_luma == 0 ? 0 : 12 ) );
- bs_write_ue( s, x264_mb_pred_mode8x8c_fix[ h->mb.i_chroma_pred_mode ] );
- }
- else if( i_mb_type == P_L0 )
- {
- DECLARE_ALIGNED_4( int16_t mvp[2] );
- if( h->mb.i_partition == D_16x16 )
- {
- bs_write_ue( s, 0 );
- if( h->mb.pic.i_fref[0] > 1 )
- bs_write_te( s, h->mb.pic.i_fref[0] - 1, h->mb.cache.ref[0][x264_scan8[0]] );
- x264_mb_predict_mv( h, 0, 0, 4, mvp );
- bs_write_se( s, h->mb.cache.mv[0][x264_scan8[0]][0] - mvp[0] );
- bs_write_se( s, h->mb.cache.mv[0][x264_scan8[0]][1] - mvp[1] );
- }
- else if( h->mb.i_partition == D_16x8 )
- {
- bs_write_ue( s, 1 );
- if( h->mb.pic.i_fref[0] > 1 )
- {
- bs_write_te( s, h->mb.pic.i_fref[0] - 1, h->mb.cache.ref[0][x264_scan8[0]] );
- bs_write_te( s, h->mb.pic.i_fref[0] - 1, h->mb.cache.ref[0][x264_scan8[8]] );
- }
- x264_mb_predict_mv( h, 0, 0, 4, mvp );
- bs_write_se( s, h->mb.cache.mv[0][x264_scan8[0]][0] - mvp[0] );
- bs_write_se( s, h->mb.cache.mv[0][x264_scan8[0]][1] - mvp[1] );
- x264_mb_predict_mv( h, 0, 8, 4, mvp );
- bs_write_se( s, h->mb.cache.mv[0][x264_scan8[8]][0] - mvp[0] );
- bs_write_se( s, h->mb.cache.mv[0][x264_scan8[8]][1] - mvp[1] );
- }
- else if( h->mb.i_partition == D_8x16 )
- {
- bs_write_ue( s, 2 );
- if( h->mb.pic.i_fref[0] > 1 )
- {
- bs_write_te( s, h->mb.pic.i_fref[0] - 1, h->mb.cache.ref[0][x264_scan8[0]] );
- bs_write_te( s, h->mb.pic.i_fref[0] - 1, h->mb.cache.ref[0][x264_scan8[4]] );
- }
- x264_mb_predict_mv( h, 0, 0, 2, mvp );
- bs_write_se( s, h->mb.cache.mv[0][x264_scan8[0]][0] - mvp[0] );
- bs_write_se( s, h->mb.cache.mv[0][x264_scan8[0]][1] - mvp[1] );
- x264_mb_predict_mv( h, 0, 4, 2, mvp );
- bs_write_se( s, h->mb.cache.mv[0][x264_scan8[4]][0] - mvp[0] );
- bs_write_se( s, h->mb.cache.mv[0][x264_scan8[4]][1] - mvp[1] );
- }
- }
- else if( i_mb_type == P_8x8 )
- {
- int b_sub_ref0;
- if( (h->mb.cache.ref[0][x264_scan8[0]] | h->mb.cache.ref[0][x264_scan8[ 4]] |
- h->mb.cache.ref[0][x264_scan8[8]] | h->mb.cache.ref[0][x264_scan8[12]]) == 0 )
- {
- bs_write_ue( s, 4 );
- b_sub_ref0 = 0;
- }
- else
- {
- bs_write_ue( s, 3 );
- b_sub_ref0 = 1;
- }
- /* sub mb type */
- if( h->param.analyse.inter & X264_ANALYSE_PSUB8x8 )
- for( i = 0; i < 4; i++ )
- bs_write_ue( s, sub_mb_type_p_to_golomb[ h->mb.i_sub_partition[i] ] );
- else
- bs_write( s, 4, 0xf );
- /* ref0 */
- if( h->mb.pic.i_fref[0] > 1 && b_sub_ref0 )
- {
- bs_write_te( s, h->mb.pic.i_fref[0] - 1, h->mb.cache.ref[0][x264_scan8[0]] );
- bs_write_te( s, h->mb.pic.i_fref[0] - 1, h->mb.cache.ref[0][x264_scan8[4]] );
- bs_write_te( s, h->mb.pic.i_fref[0] - 1, h->mb.cache.ref[0][x264_scan8[8]] );
- bs_write_te( s, h->mb.pic.i_fref[0] - 1, h->mb.cache.ref[0][x264_scan8[12]] );
- }
- for( i = 0; i < 4; i++ )
- cavlc_mb8x8_mvd( h, s, 0, i );
- }
- else if( i_mb_type == B_8x8 )
- {
- bs_write_ue( s, 22 );
- /* sub mb type */
- for( i = 0; i < 4; i++ )
- bs_write_ue( s, sub_mb_type_b_to_golomb[ h->mb.i_sub_partition[i] ] );
- /* ref */
- for( i = 0; i < 4; i++ )
- if( x264_mb_partition_listX_table[0][ h->mb.i_sub_partition[i] ] )
- bs_write_te( s, h->mb.pic.i_fref[0] - 1, h->mb.cache.ref[0][x264_scan8[i*4]] );
- for( i = 0; i < 4; i++ )
- if( x264_mb_partition_listX_table[1][ h->mb.i_sub_partition[i] ] )
- bs_write_te( s, h->mb.pic.i_fref[1] - 1, h->mb.cache.ref[1][x264_scan8[i*4]] );
- /* mvd */
- for( i = 0; i < 4; i++ )
- cavlc_mb8x8_mvd( h, s, 0, i );
- for( i = 0; i < 4; i++ )
- cavlc_mb8x8_mvd( h, s, 1, i );
- }
- else if( i_mb_type != B_DIRECT )
- {
- /* All B mode */
- /* Motion Vector */
- int i_list;
- DECLARE_ALIGNED_4( int16_t mvp[2] );
- int b_list[2][2];
- /* init ref list utilisations */
- for( i = 0; i < 2; i++ )
- {
- b_list[0][i] = x264_mb_type_list0_table[i_mb_type][i];
- b_list[1][i] = x264_mb_type_list1_table[i_mb_type][i];
- }
- bs_write_ue( s, mb_type_b_to_golomb[ h->mb.i_partition - D_16x8 ][ i_mb_type - B_L0_L0 ] );
- for( i_list = 0; i_list < 2; i_list++ )
- {
- const int i_ref_max = (i_list == 0 ? h->mb.pic.i_fref[0] : h->mb.pic.i_fref[1]) - 1;
- if( i_ref_max )
- switch( h->mb.i_partition )
- {
- case D_16x16:
- if( b_list[i_list][0] ) bs_write_te( s, i_ref_max, h->mb.cache.ref[i_list][x264_scan8[0]] );
- break;
- case D_16x8:
- if( b_list[i_list][0] ) bs_write_te( s, i_ref_max, h->mb.cache.ref[i_list][x264_scan8[0]] );
- if( b_list[i_list][1] ) bs_write_te( s, i_ref_max, h->mb.cache.ref[i_list][x264_scan8[8]] );
- break;
- case D_8x16:
- if( b_list[i_list][0] ) bs_write_te( s, i_ref_max, h->mb.cache.ref[i_list][x264_scan8[0]] );
- if( b_list[i_list][1] ) bs_write_te( s, i_ref_max, h->mb.cache.ref[i_list][x264_scan8[4]] );
- break;
- }
- }
- for( i_list = 0; i_list < 2; i_list++ )
- {
- switch( h->mb.i_partition )
- {
- case D_16x16:
- if( b_list[i_list][0] )
- {
- x264_mb_predict_mv( h, i_list, 0, 4, mvp );
- bs_write_se( s, h->mb.cache.mv[i_list][x264_scan8[0]][0] - mvp[0] );
- bs_write_se( s, h->mb.cache.mv[i_list][x264_scan8[0]][1] - mvp[1] );
- }
- break;
- case D_16x8:
- if( b_list[i_list][0] )
- {
- x264_mb_predict_mv( h, i_list, 0, 4, mvp );
- bs_write_se( s, h->mb.cache.mv[i_list][x264_scan8[0]][0] - mvp[0] );
- bs_write_se( s, h->mb.cache.mv[i_list][x264_scan8[0]][1] - mvp[1] );
- }
- if( b_list[i_list][1] )
- {
- x264_mb_predict_mv( h, i_list, 8, 4, mvp );
- bs_write_se( s, h->mb.cache.mv[i_list][x264_scan8[8]][0] - mvp[0] );
- bs_write_se( s, h->mb.cache.mv[i_list][x264_scan8[8]][1] - mvp[1] );
- }
- break;
- case D_8x16:
- if( b_list[i_list][0] )
- {
- x264_mb_predict_mv( h, i_list, 0, 2, mvp );
- bs_write_se( s, h->mb.cache.mv[i_list][x264_scan8[0]][0] - mvp[0] );
- bs_write_se( s, h->mb.cache.mv[i_list][x264_scan8[0]][1] - mvp[1] );
- }
- if( b_list[i_list][1] )
- {
- x264_mb_predict_mv( h, i_list, 4, 2, mvp );
- bs_write_se( s, h->mb.cache.mv[i_list][x264_scan8[4]][0] - mvp[0] );
- bs_write_se( s, h->mb.cache.mv[i_list][x264_scan8[4]][1] - mvp[1] );
- }
- break;
- }
- }
- }
- else if( i_mb_type == B_DIRECT )
- bs_write_ue( s, 0 );
- else
- {
- x264_log(h, X264_LOG_ERROR, "invalid/unhandled mb_typen" );
- return;
- }
- #ifndef RDO_SKIP_BS
- i_mb_pos_tex = bs_pos( s );
- h->stat.frame.i_mv_bits += i_mb_pos_tex - i_mb_pos_start;
- #endif
- /* Coded block patern */
- if( i_mb_type == I_4x4 || i_mb_type == I_8x8 )
- bs_write_ue( s, intra4x4_cbp_to_golomb[( h->mb.i_cbp_chroma << 4 )|h->mb.i_cbp_luma] );
- else if( i_mb_type != I_16x16 )
- bs_write_ue( s, inter_cbp_to_golomb[( h->mb.i_cbp_chroma << 4 )|h->mb.i_cbp_luma] );
- /* transform size 8x8 flag */
- if( x264_mb_transform_8x8_allowed( h ) && h->mb.i_cbp_luma )
- bs_write1( s, h->mb.b_transform_8x8 );
- /* write residual */
- if( i_mb_type == I_16x16 )
- {
- cavlc_qp_delta( h, s );
- /* DC Luma */
- block_residual_write_cavlc( h, s, BLOCK_INDEX_LUMA_DC , h->dct.luma16x16_dc, 16 );
- /* AC Luma */
- if( h->mb.i_cbp_luma )
- for( i = 0; i < 16; i++ )
- {
- h->mb.cache.non_zero_count[x264_scan8[i]] = array_non_zero_count( h->dct.luma4x4[i] );
- block_residual_write_cavlc( h, s, i, h->dct.luma4x4[i]+1, 15 );
- }
- }
- else if( h->mb.i_cbp_luma | h->mb.i_cbp_chroma )
- {
- cavlc_qp_delta( h, s );
- x264_macroblock_luma_write_cavlc( h, s, 0, 3 );
- }
- if( h->mb.i_cbp_chroma )
- {
- /* Chroma DC residual present */
- block_residual_write_cavlc( h, s, BLOCK_INDEX_CHROMA_DC, h->dct.chroma_dc[0], 4 );
- block_residual_write_cavlc( h, s, BLOCK_INDEX_CHROMA_DC, h->dct.chroma_dc[1], 4 );
- if( h->mb.i_cbp_chroma&0x02 ) /* Chroma AC residual present */
- for( i = 16; i < 24; i++ )
- {
- h->mb.cache.non_zero_count[x264_scan8[i]] = array_non_zero_count( h->dct.luma4x4[i] );
- block_residual_write_cavlc( h, s, i, h->dct.luma4x4[i]+1, 15 );
- }
- }
- #ifndef RDO_SKIP_BS
- h->stat.frame.i_tex_bits += bs_pos(s) - i_mb_pos_tex;
- #endif
- }
- #ifdef RDO_SKIP_BS
- /*****************************************************************************
- * RD only; doesn't generate a valid bitstream
- * doesn't write cbp or chroma dc (I don't know how much this matters)
- * works on all partition sizes except 16x16
- * for sub8x8, call once per 8x8 block
- *****************************************************************************/
- static int x264_partition_size_cavlc( x264_t *h, int i8, int i_pixel )
- {
- bs_t s;
- const int i_mb_type = h->mb.i_type;
- int j;
- s.i_bits_encoded = 0;
- if( i_mb_type == P_8x8 )
- {
- bs_write_ue( &s, sub_mb_type_p_to_golomb[ h->mb.i_sub_partition[i8] ] );
- if( h->mb.pic.i_fref[0] > 1 )
- bs_write_te( &s, h->mb.pic.i_fref[0] - 1, h->mb.cache.ref[0][x264_scan8[4*i8]] );
- cavlc_mb8x8_mvd( h, &s, 0, i8 );
- }
- else if( i_mb_type == P_L0 )
- {
- if( h->mb.pic.i_fref[0] > 1 )
- bs_write_te( &s, h->mb.pic.i_fref[0] - 1, h->mb.cache.ref[0][x264_scan8[4*i8]] );
- if( h->mb.i_partition == D_16x8 )
- cavlc_mb_mvd( h, &s, 0, 4*i8, 4 );
- else //8x16
- cavlc_mb_mvd( h, &s, 0, 4*i8, 2 );
- }
- else if( i_mb_type == B_8x8 )
- {
- bs_write_ue( &s, sub_mb_type_b_to_golomb[ h->mb.i_sub_partition[i8] ] );
- if( h->mb.pic.i_fref[0] > 1
- && x264_mb_partition_listX_table[0][ h->mb.i_sub_partition[i8] ] )
- bs_write_te( &s, h->mb.pic.i_fref[0] - 1, h->mb.cache.ref[0][x264_scan8[4*i8]] );
- if( h->mb.pic.i_fref[1] > 1
- && x264_mb_partition_listX_table[1][ h->mb.i_sub_partition[i8] ] )
- bs_write_te( &s, h->mb.pic.i_fref[1] - 1, h->mb.cache.ref[1][x264_scan8[4*i8]] );
- cavlc_mb8x8_mvd( h, &s, 0, i8 );
- cavlc_mb8x8_mvd( h, &s, 1, i8 );
- }
- else
- {
- x264_log(h, X264_LOG_ERROR, "invalid/unhandled mb_typen" );
- return 0;
- }
- for( j = (i_pixel < PIXEL_8x8); j >= 0; j-- )
- {
- x264_macroblock_luma_write_cavlc( h, &s, i8, i8 );
- h->mb.cache.non_zero_count[x264_scan8[16+i8]] = array_non_zero_count( h->dct.luma4x4[16+i8] );
- block_residual_write_cavlc( h, &s, 16+i8, h->dct.luma4x4[16+i8]+1, 15 );
- h->mb.cache.non_zero_count[x264_scan8[20+i8]] = array_non_zero_count( h->dct.luma4x4[20+i8] );
- block_residual_write_cavlc( h, &s, 20+i8, h->dct.luma4x4[20+i8]+1, 15 );
- i8 += x264_pixel_size[i_pixel].h >> 3;
- }
- return s.i_bits_encoded;
- }
- static int cavlc_intra4x4_pred_size( x264_t *h, int i4, int i_mode )
- {
- if( x264_mb_predict_intra4x4_mode( h, i4 ) == x264_mb_pred_mode4x4_fix( i_mode ) )
- return 1;
- else
- return 4;
- }
- static int x264_partition_i8x8_size_cavlc( x264_t *h, int i8, int i_mode )
- {
- int i4, i;
- h->out.bs.i_bits_encoded = cavlc_intra4x4_pred_size( h, 4*i8, i_mode );
- for( i4 = 0; i4 < 4; i4++ )
- {
- for( i = 0; i < 16; i++ )
- h->dct.luma4x4[i4+i8*4][i] = h->dct.luma8x8[i8][i4+i*4];
- h->mb.cache.non_zero_count[x264_scan8[i4+i8*4]] =
- array_non_zero_count( h->dct.luma4x4[i4+i8*4] );
- block_residual_write_cavlc( h, &h->out.bs, i4+i8*4, h->dct.luma4x4[i4+i8*4], 16 );
- }
- return h->out.bs.i_bits_encoded;
- }
- static int x264_partition_i4x4_size_cavlc( x264_t *h, int i4, int i_mode )
- {
- h->out.bs.i_bits_encoded = cavlc_intra4x4_pred_size( h, i4, i_mode );
- block_residual_write_cavlc( h, &h->out.bs, i4, h->dct.luma4x4[i4], 16 );
- return h->out.bs.i_bits_encoded;
- }
- static int x264_i8x8_chroma_size_cavlc( x264_t *h )
- {
- h->out.bs.i_bits_encoded = bs_size_ue( x264_mb_pred_mode8x8c_fix[ h->mb.i_chroma_pred_mode ] );
- if( h->mb.i_cbp_chroma )
- {
- block_residual_write_cavlc( h, &h->out.bs, BLOCK_INDEX_CHROMA_DC, h->dct.chroma_dc[0], 4 );
- block_residual_write_cavlc( h, &h->out.bs, BLOCK_INDEX_CHROMA_DC, h->dct.chroma_dc[1], 4 );
- if( h->mb.i_cbp_chroma == 2 )
- {
- int i;
- for( i = 16; i < 24; i++ )
- {
- h->mb.cache.non_zero_count[x264_scan8[i]] = array_non_zero_count( h->dct.luma4x4[i] );
- block_residual_write_cavlc( h, &h->out.bs, i, h->dct.luma4x4[i]+1, 15 );
- }
- }
- }
- return h->out.bs.i_bits_encoded;
- }
- #endif